Item Type: Wireless UHF MicrophoneMaterial: Aluminum AlloyModulation Method: Digital Frequency ModulationFrequency Range: 700mhz-800mhzReceiving Distance: Approx. 20m-100m/66ft-328ft in Open AreaFrequency Response: 50hz-18KHZSignal to Noise Ratio: >90dBDistortion: 0.5% at 1KHZ+Output Level: 200MV 5MVWireless Receiver Battery Type: 1 x 18650 Battery(Not Included)Microphone Battery Type: 2 x AA Batteries (Not Included) Package List1 x Microphone1 x Charging Cable1 x Receiver1 x Sponge Cover1 x ManualBattery is not included.1MINI RECEIVER: The USB power supply design can supply power as long as it is 5V, and it can be powered by computers, power banks, etc., and the battery life is long lasting. 2LONG LASTING: This portable microphone and receiver are made of strong aluminum alloy, which has strong impact resistance and corrosion resistance. strong and sturdy. 3MULTI CHANNEL GROUP FREQUENCY POINTS: Can also manually tuned. When multiple sets of machines are used on the same occasion, different frequency points can be selected to avoid interference cross frequency. 4COMPATIBLE: The microphone has an operating range of 330ft, super strong signal stability, suitable for most audio equipment with 6.5mm interface, plug and play. 5FILTER NOISE: The professional imported dynamic microphone core is used to restore the human voice, and the special filter cotton can filter out the noise, so that the output sound is clear and pleasant.